Navigating C++ and Object-Oriented Design

3.5. Exceptions

When you design functions, you cannot always assume that applications will call them correctly. It may be inappropriate, for example, for a function to report an error message, return an error code, or exit from a system. To handle these types of exceptions, we use language constructs to separate error handling code from ordinary code. This approach adds uniformity to program design and makes exception handling portable.

This section introduces exceptions and provides the basics for exception handling in subsequent functions and classes. Listing 3.13 is a program to get you started.

Listing 3.13. Exception handling

// hypot.C - exceptions #include <iostream.h> #include <math.h> int main() { try { float f, g; cout << "Input sides ...